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20mm F1.4 DG DN | Art

Save $50.00
Original Price $1,249.95
Current Price $1,199.95
Availability: Translation missing: en.general.icons.icon_check_circle icon In stock, ready to be shipped

Outstanding optical quality and a range of invaluable features – The ultimate astrophotography lens from the 20mm F1.4 pioneer

The F1.4 series represents the SIGMA Art line, which pursues the highest optical performance and rich expression. The full-frame SIGMA 20mm F1.4 DG DN | Art is a mirrorless version of the SIGMA 20mm F1.4 DG HSM | Art; the one and only lens* with its unique specification of maximum aperture of 1.4 and an ultra-wide angle of 20mm. This lens offers photographers overwhelming optical performance and unlimited potential for ultra wide-angle creativity at a compact physical size. The exceptional F1.4 brightness and the breathtaking sharpness across the entire image even at maximum aperture make this lens the ultimate choice for astrophotography. In nightly darkness and focused to infinity, the 20mm F1.4 DG DN | Art captures stars in the sky as clear, precise pinpoints of light. State-of-the-art optical design and the large, high-precision double-sided aspheric glass front element made it possible to add a front filter thread without any compromises regarding optical performance or size. The addition of other invaluable features such as a rear filter holder and a variety of useful switches further increases the creative possibilities and easy usability of the lens. Its incredible sharpness and very bright aperture, coupled with the compact body and thoughtful features, make the SIGMA 20mm F1.4 DG DN | Art the ultimate lens for astrophotography and an ideal companion for any photographically demanding situation.

Highest optical performance on a new level
The SIGMA 20mm F1.4 DG DN | Art delivers exceptionally detailed results that easily satisfy the high demands of professional photography and other high-end applications. With 17 glass elements arranged in 15 groups, including two SLD, three aspherical glass elements and the largest class double-sided aspherical glass element in SIGMA’s history, the 20mm F1.4 DG DN | Art rigorously suppresses various optical aberrations such as sagittal coma flare or image distortion to produce highly-detailed images with exceptional sharpness and accuracy from the center to the furthest corners, allowing photographers to make use of the entire field of view afforded by its ultra-wide viewing angle. This ultimate astrophotography lens is the culmination of the unparalleled manufacturing technology of SIGMA’s sole production base in Aizu, Japan, as well as the company’s know-how and experience with large-aperture wide-angle lenses, such as the SIGMA 20mm F1.4 DG HSM | Art, the SIGMA 14mm F1.8 DG HSM | Art and the SIGMA 14-24mm F2.8 DG DN | Art.

Designed for perfect results even in the most demanding conditions
SIGMA’s outstanding design and high-precision manufacturing capabilities made it possible to equip the SIGMA 20mm F1.4 DG DN | Art with a front filter thread despite its very large F1.4 aperture and 20mm ultra-wide viewing angle. The lens also comes with a rear filter holder, allowing photographers the freedom to combine multiple filters to suit a huge variety of shooting situations for near-unlimited creative potential at an ultra-wide viewing angle—for example, using a front filter to reduce light pollution and a softening filter on the rear to take impressive photographs of nightly landscapes with star-filled skies. The new MFL (Manual Focus Lock) switch to turn off the focus ring makes it easier to concentrate on the shoot without worrying about accidentally changing the focusing distance. Further, the lens also equips a lens heater retainer, meaning that lens heaters used to prevent internal condensation as the temperature drops on longer night shoots will stay securely attached to the barrel without protruding into the image and causing unsightly vignetting. With its brilliant optical power and its full range of useful features despite its compact and lightweight body, the SIGMA 20mm F1.4 DG DN | Art is the ultimate choice when photographing the night sky.


Passion: Broadening the mind for a bigger world

Tony Nöel

Tony Noel is an action photographer based in France. Through his photos, he shows his passion for the dynamic movement of his models who are mostly dancers, and tries to push his boundary with a wide-angle lens. He enjoyed the look that a 20mm lens brings to create variations of similar scenes. We can see that he plays with the tension that is given by the wide angle as well as the close-up like effect to create a sort of rhythm in similar scenes.

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My dream lens for astrophotography

Jack Fusco

These beautiful photos were taken in Assateague National Seashore in Maryland and Taughannock Falls near Ithaca, New York for the starry sky, waterfall and Milky way. The wide angle of view of 20mm conveys the grandeur of nature. Jack was blown away by the optical performance of this lens, even in the extreme corners. The stars remained pinpoint dots of light, truly an astrophotographer’s dream.

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Lens Construction
17 Elements in 15 Groups
Angle of View
Diaphragm Blades
11 (Rounded)
Minimum Aperture
Minimum Focusing Distance
23 cm / 9.1 in.
Maximum Magnification Ratio
Filter Size
Dimensions (Diameter x Length)
φ87.8mm x 111.2mm / φ3.5in. x 4.4in.
Sony E-Mount
φ87.8mm x 113.2mm / φ3.5in. x 4.5in.
635g / 22.4oz.
Sony E-Mount
630g / 22.2oz.
Supplied Accessories
Case, Petal-type lens hood with lock (LH878-04), Front Cap (LCF-82 III), Rear Cap (LCRII), Guide Plate (GP-21)
Corresponding AF Mounts / Barcode No.
Sony E-Mount

Lens Construction

Diffraction MTF

Geometrical MTF

7 Year Canadian Warranty

All SIGMA lenses purchased from authorized Canadian retailers are backed by a seven year Canadian warranty. Our factory trained technicians perform most repairs on-site at our facility in Markham, Ontario.

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